The average bottle had 313,000 bacteria colony forming units per square centimeter. That’s about 100,000 times more than your toilet seat.
And it’s about six times less sanitary than drinking out of your dog’s water bowl.
The researchers say it’s because your water bottle is the perfect damp, hot environment for bacteria to grow. So if you are going to drink out of a reusable bottle, swap it out after a day or two.
This story was originally reported by TreadmillReviews.net
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